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1. 发明授权

KR840001380B1 A PROCESS FO HIGH-STRENGTH,HIGH-WOKKABILITY STEEL FOR COLD PLASTIC WORKING 失效
公开(公告)号：KR840001380B1
公开(公告)日：1984-09-21
申请号：KR790001179
申请日：1979-04-13
申请人： KOSYUHA NETUREN CO LTD
发明人： HIJIKATA TOSHIO , KAWASAKI GAZUHIRO
IPC分类号： C21D1/25
摘要： Following hig-frequency radio heating, the steel material is quenched by 0.17-0.65% C, 0.15-2.20% Si, 0.70-1.65% Mn or is quenched by Cr or Mo. After rapidly heating the steel above the austenite transftrring temperature, it is again quenched, and then is heated to 300-600≦̸C at a rate of 100≦̸C/Sec. Once the steel reaches the desired heat, it is then cooled at a rate of 50≦̸C/sec.

2. 发明授权

KR840001381B1 A PROCESS FO COLD PLASTIC WORKABLE STEEL FOR HIGH-STRENGTH, HIGH-FREFUENCY, HIGH-CREEP 失效
公开(公告)号：KR840001381B1
公开(公告)日：1984-09-21
申请号：KR790001181
申请日：1979-04-13
申请人： KOSYUHA NETUREN CO LTD
发明人： HIJIKATA TOSHIO , KAWASAKI GAZUHIRO
IPC分类号： C21D1/25
摘要： This process is used for coil-springs, plate-springs and torsion-bars, and in the manufacturing process may be used for all products requiring a plastic-working procedure. After quenchable steel of 0.17-0.65% C, 0.15-2.2% Si, and 0.07-1.65% Mn, is heated above the austenite transforming temp., it is quenched. By high-frequency induction heating, it is heated until it reaches the desired temp. Once the temp. is reached, the steel is cooled again. This results in a cold plastic workable steel of more than 150kg/mm2. to temper the steel, it is reheated to 300-500≦̸C for 30-50 min. and then low temp. tempering is performed.

3. 发明公开

KR20180019212A 현가 스프링용 강 및 그의 제조 방법 审中-公开
标题翻译：悬挂弹簧钢及其制造方法
公开(公告)号：KR20180019212A
公开(公告)日：2018-02-23
申请号：KR20187001798
申请日：2016-07-27
申请人： NIPPON STEEL & SUMITOMO METAL CORP , NETUREN CO LTD
发明人： SUZUKI TAKAHISA , CHIBA KEISUKE , MIYAMOTO HIROTSUGU , IWANAGA KENGO , OKAMURA TSUKASA , FUJIWARA FUMIAKI , EBANA YUKIO
IPC分类号： C21D8/06 , C21D1/18 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/34
CPC分类号： C21D8/06 , C22C38/00 , C22C38/18 , C22C38/54
摘要： 고가의합금원소의첨가를억제하고또는요하지않고, 큰인장강도를갖고또한내지연파괴특성및 냉간가공성이우수한현가스프링용강을제공한다. 질량%로, C : 0.40 내지 0.70%, Si : 0.80 내지 2.20%, Mn : 0.05 내지 1.50%, Cr : 0.05 내지 1.00%를함유하고, P : 0.020% 이하, S : 0.020% 이하로제한하고, 잔부가 Fe 및불가피적불순물로이루어지고, 압연방향에평행인단면에있어서, 면적률로금속조직의 90% 이상이템퍼링마르텐사이트이고, 압연방향에평행인단면에있어서, 표면으로부터직경또는두께의 10%의범위에서, 구오스테나이트결정립의장축방향의길이와상기장축방향에직교하는방향의길이의비가 1.5 이상이고, 압연방향으로부터본 마르텐사이트집합조직의 집합률/ 집합률의비가 3.0 이상인것을특징으로하는현가스프링용강.
摘要翻译：本发明提供抑制或消除昂贵的合金元素的添加，拉伸强度大，耐延迟断裂性和冷加工性优异的悬架钢弹簧。以质量％计，C：被限制为不超过0.020％，0.40到0.70％以下，Si：0.80〜2.20％以下，Mn：0.05〜1.50％以下，Cr：0.020％以下，S：0.05〜含有1.00％的P和其余由Fe和不可避免的杂质构成，与轧制方向平行的截面中的90％以上的金属组织为回火马氏体，在与轧制方向平行的截面中，％以上的范围内时，旧奥氏体比为1.5或垂直于晶粒的方向上的长轴多个硝基长轴长度的方向的长度的，从<011>设置速率/ <111>设置的马氏体组织的速率的轧制方向而且比例为3.0或更高。

4. 发明授权

KR820001821B1 HIGH STRENGHT SPRING STEEL AND ITS MANUFACTURING PROCESS 失效
公开(公告)号：KR820001821B1
公开(公告)日：1982-10-12
申请号：KR790000553
申请日：1979-02-22
申请人： NETUREN CO LTD
发明人： HIJIKATA T , YAMAZAKI T , FUJITAKA K
IPC分类号： C21D1/18
摘要： This method is related to the high strength spring steel with the surface layer having the super microscopic structure. The heating temp. of the steel surface is between the higher AC3 transformation point and the lower Ar1 transformation point. At that temp. the steel is alteted repeatedly in a short period of time. When the steel material is heated, the temp. of the steel center becomes more intense. After that, the steel material is cooled at the short time. So, the high strength spring steel having the detailed crystal grain is manufactured.

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